Friction spring draft-rigging for railway-cars.



PATBNTED MAP.. 15, 1904.

P. N. MODRE.

FRIGTION SPRING DRAFT RIGGING FOR RAILWAY GARS.

APPLICATION PII-JED NOV. 5, 1903.

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N0 MODEL.

INI/ENTOR. Feier More Y WHA/55555:

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PATENTED vMAR. 15, 1904.

P. N. MOORE..

FRIGTINSPRINGDRAFT RIGGrING FOR RA-ILWAY GARS.

APPLICATION FILED N015', 1903.

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WITNESSES.-

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No. 754,679. Patented March 15, 1904. I

UNITED .STATES PATENT OFFICE.

PETER N. MOORE, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO JOHN J. HENNESSEY, OE MILWAUKEE, WISCONSIN, AND WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

FRICTION SPRING DRAFT-HIGGING FOR RAILWAY-CARS.

SPECIFICATION forming part of Letters Patent No. 754,679, dated March 15, 1904. Application filed November 5, 1903, Serial No. 179,904. (No model.)

T @ZZ wfwm t may COWWW/f C is the coupler, B the draw-bar, and B the Be it known that I, PETER N. MOORE, a citidraw-bar extension, the same being repreo zen of the United States, residing in Milwausented as in the form of a strap or yoke sekee, in the county of Milwaukee and State of cured to the draw-bar by bolts b. 5 `Wisconsin, haveinvented anew an'd useful Im- D D are the side plates or stop-casting, the provement in Friction Spring Draft-Rigging same having front and rear stops l for the for Railway-Cars, of which the following is a followers E E to abut against and upper and 5 5 specification. lower guides d' and Z2 for thefollowers to My invention relates to friction spring reciprocate in or between, the upper guide CZ 1o draft-rigging for railway-cars. being preferably integral with the side plates The friction spring draft-rigging embodyor stop-castings D, and the lower guide Z2 being my invention comprises in cooperative ing preferably in the form of a removable 60 combination a draw-bar, draw-bar extension, plate secured in place by bolts d3 to permit a longitudinally-arranged spring, followers, the ready insertion and removal of the mov- I 5 side plates or stop-castings, a sliding frictionable parts of the draft-rigging.

shell having an interior friction-surface ex- E is a longitudinally-arranged spring ditending nearly its full length and a plurality rectly behind the draw-bar and in the line of 65 of sliding friction-blocks inside the case or draft, there being also, preferably, a small shell and confined thereby from lateral or outspring f nesting within it.

2O ward movement, and having exterior friction- G is the sliding friction shell or case, the

surfaces and integral friction extensions or same beingpreferably rectangular in cross- Wings projecting beyond the front end of the section and having interior and preferably 70 spring to increase the frictional surface of slightly tapering' or flaring friction-surfaces the sliding friction-blocks against the shell, g on its two upright sides and terminating in and provided with interengaging wedging or a straight portion g3 near the rear end of the inclined operating-faces for causing the slidshell. The friction-shell G has feet or proing friction-blocks to frictionally grip and jections g to rest or slide upon the lower guide 75 press the friction-shell. d? of the side plate or stop-castings D.

My invention also consists in the novel con- H H are cooperating sliding friction-blocks,

struction of parts and devices and in the novel having each a wing or projection H extendcombinations of parts and devices hereiny ing nearly the length of the shell G and emshown or described.. bracing the` spring E between them. The 8O In the accompanying drawings, forming a wings or projections Hl materially increase part of this specification, Figure 1 is a central the interengaging friction-surfaces of the fric- 55 vertical section of a friction draft-rigging tion-shell and friction-blocks without increasembodying my invention. Fig. 2 is a horiing the length of the draft-rigging or the Zontal section, partly in plan. Fig. 3 is a space between the followers EE, as the spring 8 5 cross-section on line 3 3 of Fig. 2, and Eig. lies between the friction-wings H H.' The 4 a cross-section on line 4 4 of Fig. 2. Fig. friction-blocks and their wings have' exterior 40 5 is a perspective view of one of the sliding and preferably slightly tapering or flaring friction-blocks and showing the other fricfrictional surfaces L on their vertical sides tion-block in dotted lines, and Fig. 6 is a deparallel to and in sliding frictional engage- 90 tail horizontal section showing the spring comment with the corresponding interior fricpressed. tional faces g of the shell Gr. The sliding In the drawings,A representsl the draft-timfriction-blocks H H are provided with interbers or center sills of a car; A, the front or 4engaging wedging or inclined operating-faces cross sill, the same being represented of an K K', the same meeting, preferably, in a ver- 95 ordinary steel-frame construction. v tical plane and operating to press or force-the plates K2 on their friction-faces.

friction-surfaces /i 7L against the friction-surfaces g g of the shell G. The front end of the spring F bears against the front follower E through the interposed sliding friction-blocks H H, and the rear end of the spring F bears against the rear follower 'E through an interposed seat-block M, which projects through the open end of the sliding friction case or shell Gr, and is provided with a shoulder m engaging an interior shoulder g2 on the shell or case Gr. A spring seat or cap N, having a fiange n and central stud n, is preferably interposed between the end of the spring F and the rear sliding friction-block H. The seatblock M is also preferably furnished with a stud or projection m to retain the springs in position. The friction-blocks H H are held from lateral transverse movement by the surrounding friction shell or case G, and the frictional resistance is exerted by and confined to the friction-surfaces r1 and L of the friction shell and blocks, and these interengaging friction-surfaces being inside the shell Gr are protected thereby from dirt, sand. and grit and from variation and uncertainty of action incident thereto. The slightlytapering form of of the friction-surface of the shell, terminating, as it does, in a straight portion near the rear end of the friction-blocks H H, prevents the backward and forward play of the blocks from wearing and forming a shoulder or unevenness on the friction-shell Inear the rear end of the blocks and causes the friction-shell to continually wear smooth.

The friction-blocks H H are provided, or preferably provided, with inserted wearing- If desired, similar plates K3 may be inserted on the wedging or inclined operating-faces K K of the friction-blocks H H. The purpose of the plates K3, however, is to preventjvear and not to produce a frictional resistance, as the friction-blocks H H being confined from lateral or outward movement by the inclosing shell G the plates K3K3 have only a very slight and substantially no slipping or sliding movement in respect to each other.

In operation: In pulling or buing the first movement of the draw-bar is cushioned by the direct action of the spring itself until the rear end of the sliding friction-shell and the rear follower engage, when the further movement of the draw-bar causes the sliding frictionshell G and friction-blocks H H to frictionally slide, the one in respect to the other, the frictional grip and pressure between the interengaging frictional surfaces g and /t increasing as the spring is more and more compressed. Owing to the slightly-tapering form of the friction-surfaces g g of the sliding friction-shell Gr when the blocks H H move inward in respect to the shell Gr, the outer block H slips slightly outward in respect to the inner block H to compensate for the slight taper of the friction-surfaces g g on the shell; but

the separating movement of the blocks H H in respect to each other is very slight or infinitesimal, so to speak, as the wedging faces K K of the blocks H H are at a steep angle, while the taper of the surfaces g g is very small.

I claim 1. In a friction draft-rigging, the combination witha draw-bar, draw-bar extension, longitudinally-arranged spring, followers, and side plates or stop-castings, of a sliding friction shell or case having an interior frictionsurface, a plurality of sliding friction-blocks inside said case or shell and confined thereby from lateral or transverse movement, and each provided with a projecting wing extending on each side of the spring and embracing the same, and having exterior friction-faces in sliding frictional engagement with the interior friction-surface of the case or shell, and provided with interengaging wedging or inclined operating-faces for causing the sliding friction-surfaces of the friction shell or case and friction-blocks, to frictionally grip or forcibly press against each other, said followers and said sliding friction-blocks being in separate pieces and independent of each other, substantially as specified.

2. In a friction draft-rigging, the combination with a draw-bar, draw-bar extension, longitudinallyarranged spring, followers, and side plates or stop-castings, of a sliding friction shell or case having an interior frictionsurface, a plurality of sliding friction-blocks inside said case or shell and confined thereby from lateral or transverse movement, and each provided with a projecting wing extending on each side of the spring and embracing the same, and having exterior friction-faces in sliding frictional engagement with the interior friction-surface of the case or shell, and provided with interengaging wedging or inclined operating-faces for causing the sliding friction-surfaces of the friction shell or case and friction-blocks, to frictionally grip or forcibly press against each other, and a seat-block for the spring interposed between one end of the spring and one of the followers to permit a partial compression of tlie spring before the follower engages the friction shell or case, substantially as specified.

3. In a friction draft-rigging, the combination withadraw-bar, draw-bar extension, longitudinallyarranged Spring, followers, and side plates or stop-castings, of a sliding friction shell or case having an interior frictionsurface, a plurality of sliding friction-blocks inside said case or shell and confined thereby from lateral or transverse movement, and each provided with a projecting wing extending on each side of the spring and embracing the same, and having exterior friction-faces in sliding frictional engagement with the interior friction-surface of the case or shell, and provided with interengaging wedging or inclined IOO IIO

operating-faoes for causing the sliding friopendent of each other, substantially as specition-surfaces of the friction shell or oase and fied. v friction-blocks, to frictionally grip or forcibly press against each other, said friction-blocks PETER N MOORE 5 having inserted Wearing-plates on their fri'- Witnesses:

tion-faces, said followers and said slidingfrie- H. M. MUNDAY, tion-blocks being in separate pieces and inde- EDMUND ADCOGK. 

